strengths of this book very interesting ..rubriques beautiful photos: chakras, physiological correspondences degree of vibration ... the legendary power, the healing power, the power of transformation ... weaknesses: a sometimes too "esoteric language "eg" rub horizontal streaks of quartz lemur ... to read the past lemurien or Atlantean .. ??? and stones found in commerce "dawn quartz", "blue stone Preselli Mountains" ?? I recommend the beginners but it's still a beautiful book ...